Chevrolet 2006 Tahoe Owner's Manual page 22

5. Squeeze the release lever to release the seat from
the floor, while pulling the seat out.
6. While holding the rear of the seat up, roll the seat
out of the vehicle.
1-16
Installing the 50/50 Split Bench Seat(s)
CAUTION:
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A safety belt that is improperly routed, not
properly attached, or twisted will not provide
the protection needed in a crash. The person
wearing the belt could be seriously injured.
After raising the rear seatback, always check
to be sure that the safety belts are properly
routed and attached, and are not twisted.
To install the seat, do the following:
1. Open the liftgate to access the rear of the vehicle.
2. While holding the rear of the seat up, slide the
front wheels into the slots on the floor. The front
latches should lock into place. If the latches do not
lock, try tilting the rear of the seat upward.
3. Once the latches are engaged, let the seat drop
into place.